Winding machine stop mechanism



Oct. 31, 1944. H. J. MdDERMOTT WINDING MACHINE STOP MEQHANISM Filed July 8, 1943 w QM v aw .N

4 mvsmoi b'A/PY J/FDseMoTT ATTORNEY.

ill llwmr Patented Get. 31, 1944 time STATE PATENT FFICE MACHINE STOP MECHANISM Henry J. McDermott, Prospect Park, Pa., assignor to American Viscose Corporation, Wilmington, DeL, a corporation of Delaware Application July 8, 1943, Serial No. 493,809

- 4 Claims.

This invention relates to winding machines and ,more particularly to an improved device for arresting the operation of the machine whenever I the yarn being wound becomesexcessively tensioned and before such tension can reach thebreaking stress of the material. Excessive tension in the yarn may result from various causes including the tendency of the yarn to adhere to the supply package or to catch upon'irregularities of other windings of the supply package;

The development of excessive tension may cause breakage of the yarn, irregularities in the wound package, and, where high tenacity yarns or'co'rds' are involved, damage to the machine, such as distortion of parts and excessive ='wear..

In accordance with the present invention, the yarn on its way to the winding spindle of the machine passes through -a thread-storage loop which varies in size inversely with the tension in the yarn,and imparts movementto a member for initiating operation of the stop a predetermined tensionis attained. Further objects ,and advantages will be apparent from the drawing and the description thereof.

In the drawing, illustrative .of the invention, Figure 1 is a front elevation of a conventional winding machine of the type shown in Wardwell Patent 801,941 (United States) and showinga preferred embodiment of the present invention applied thereto, and

Figure 2 is a side'elevation of the machine of Figure 1.

While the invention will be described hereinafter in relation to a particular type ofconventional winding machine, it is to be understood that it is not limited to application thereto. In ,the description, the conventional parts of the winding machine will first be described and this will be followed. by a description of the parts which constitute the present invention.

Referring to Figures 1 and 2 of the drawing,

chain, (not shown). The shaft 6 also carries a helical grooved cam 'i for rotation therewith.

A traverse frame 8 is pivotally mounted upon the shaft 6 upon which it is suitably balanced .such as by the counterweight 9. "This traverse frame a is provided-with a,backing plate 10 and a porcelain ball I i may be rotatably supported on a wire I2 whose depending legs adjacent the ends of the bail are suitably fastened within recesses in the plate Jllj, by means of set screws IS. The traverse frame 8 is constructed to provide a horizontal groove through which a traverse bar It mayreciprocate. A thread guide it, whose upper end is adapted to press lightly against the package being wound is fastened to one end of the traverse bar It for reciprocation therewith. The other end of the traverse bar It is providedwith a head is having a depending pin or roller ll adapted to engage the groove in the helical means when cam I. As the package builds up, it gradually swings the traverse frame 8 away from the spindle 3 and the traverse frame is prevented from swinging back toward the spindle by means of a lever l8 havingone end fastened thereto at it and the other end engaging within a groove formed underneath a segment 20 which is pivotally fastened to the main frame 2 at 2|.

. The operation of the winding machine is controlled by a starting lever or handle 22, mounted on one end of a rotatable rod 23, supported in bearings at the top of the main frame 2.

The opposite end of the rod 23 carries means for operating a clutch or similar device (not reference numeral 2 designates the fixed'main r frame of the machine. a rotating spindle 3 is journaled in suitable bearings and-is adapted to be driven by means'of'a belt pulley or other suitable mechanism (not shown) The spindle is adapted to receive a cone At the top of frame 2,-

tion the, clutch or other device for operatingthe spindle 3 is disengaged. The other end of the lever 24 is formed as a curved arm having'a hook 2.1 at its end. When the starting lever 22 is in operating position. in which the clutch is enorcop tube 4 uponwhich the package 5 is to be wound. r A. shaft 6 is journaled in the frame 2 and extends in a direction parallel to the winding spin-;' die '3. This shaft 6 is connected to the spindle and is driven therefrom bysuitable means, such as' 'gears'a belt and pull eys, or'sprockets and gaged with the spindle 3 and the brake is lifted therefrom '(asshown in Figure 1) the hook engages another hook 28 secured to or constituting part of the pivoted segment 20. The machine may be maintained in running position by setting these hooks 21. and

'25 which otherwise 28 in opposition to the spring would tend to set the brake A tension gate 34 in conventional construction is secured on bracket 30 and the tension exerted upon the yarn passing therethrough is controlled by a link 35 having one end attached to one of the grids of the tension gate 34 and the other end'attached at 36 to a counterweighted arm 31 which is pivotally connected with the other arm 29. As the package grows in size, the rm 31 swings in a clockwise direction and thereby gradually reduces the tension exerted on the yarn by Sate 34.

In operation of the machine, the yarn passes first through the tension gate 34 over the guide 38 of a slub-catcher, under a break or exhaustion detector 39, over the porcelain bail and through the traverse guide 15 to the package. The break detector 39 comprises a device pivotally mounted at 40 upon segment 20. The device is composed of a bell crank lever'39a and two arms 4| and 42, one of which 4| extends toward a' wheel 43 having numerous projections or ridges 44 thereon mounted upon the cam shaft 5 for rotation thereby. The other arm 42 is bent to form a horizontal extension 45 adapted to ride upon the yarn and along which the yarn may traverse to a certain extent. The extension 45 may be bent at the end to form a hook 46 to prevent the yarn from accidentally slipping out of engagement therewith. Arms 4| and 42 have the bent portions 4| and 42' which extend through holes in the bell crank lever 39a. Arm 42 is clamped in fixed relation tcthe bell crank lever 3911 by the screw 42a and the slotted plate 39b. The arm 4| is preferably though not necessarily mounted for pivotal motion with respect to the device 39 as a whole and independently of arm 42. As shown, this may be accomplished by loosening the machine screw-4m which limits the counterclockwise swinging of arm 4| relative to the device 39. The first arm 4| is-oi such length and the entire detector device 39 is so balanced that upon breakage of the yarn, the device swings in a clockwise direction to bring arm 4| into the path of the projections 44 upon the rotating wheel 43 which in turn forces the segment 20 in a counterclockwise direction sufilciently to release the two hooks 21 and 23 and thereby permit the spring 25 to throw the starting lever 22 into the stop position to apply the brake and disengage the clutch. A projection 41 serves to limit clockwise motion of the detector'39.

The parts of the machine so far described are in the main part conventional and constitute no essential. part of this invention except as will appear hereinafter. In accordance with this invention, the yarn or the like coming from a supply package proceeds through a tension device 34 rotatable pulley 49 which is swingably supported on a pivot 50. The pivotal member carry the pulley 49 has a projecting arm 5| the upper end of which hooks over the plate 52 pivotally mounted at 53 and normally (that is during winding) is over a guide in the form of a retained in a notch 54 in plate 52. A projectin arm 55 extends upwardly from the plate 52 to a'positi'on beneath the arm 4| of the breakage and exhaustion detector 39. Plate 52 has an ear-like projection 53 having an arcuate contour starting adjacent the notch 54. An adjustable counterweight 51 is carried by an arm 58 on the pivotal support for the pulley 49.

The counterweight is adjusted to maintain the desired tension in the yarn loop. When during winding, this tension is exceeded, the loop about pulley 49 is reduced in size against the counterbalancing effect of the weight 51. Such motion causes counterclockwise swinging of projection 55 and swinging of arm 4| into wheel 43 and stopping oi the machine. Since stopping is not always immediate, binding of the parts involved upon without increasing the tension in the yarn.

In the present specification and claims, the term package" is used in a general sense to indicate any form of wound mass and the term yarn is intended to designate any kind of strand material whether textile or otherwise.

While a preferred embodiment of the invention has been disclosed, it is to be understood that changes and variations may be made with-' out departing from the spirit and the scope of the invention as defined by the appended claims.

I claim:

1. In a-winding machine, a winding spindle, a traverse mechanism, means for swinging said spindle and traverse mechanism relative to each other about an axis substantially parallel to that of the spindle as the winding proceeds, means for stopping said machine automatically comprising an arm arranged to be swung into en gagement with an operating member of said ma- 2. In a winding machine, a winding spindle, a-

traverse mechanism, means for swinging said spindle and traverse mechanism relative to each other about an axis substantially parallel to that of the spindle as the winding proceeds, means .for stopping said machine automatically comprising an arm arranged to be swung into engagement with an operating member of said machine to initiate the operation of said stopping means, means comprising a. movable guide reguide is beneath the a sponsive to the tension in the yarn; for directing the yarn as it proceeds to the spindle through a yarn-storing loop and means normally connected with the guide for moving the arm into engagement with the operating member when the tension in the yarn increases to a predetermined extent, the last-mentioned means being arranged to be disconnecteddrom the guide approximately at the. time of engagement of\the arm with the operating member.

3. In a winding machine, a winding spindle, means for stopping the machine automatically comprising an arm arranged to be swung into engagement with an operating element of the machine to initiate the operation of the stopping means, a pivotally mounted guide counterbalanced for directing the yarn as it proceeds to the spindle through a yarn-storing loop, a

pivotally mounted member movable to engage the arm, and a releasable connectionbetween the guide andthe member arranged to be released upon motion of the member by the guide to efiect initiation of the stopping means.

4. In a winding machine, a winding spindle, means for stopping the machineautomatically comprising an arm arranged to be swung into- 

